Cylinder for thrashing machines



R. H. OWEN.

CYLINDER FOR THRASHING MACHINES.

APPLICATION FILED NOV. 2, 1921.

1241,@33 Patented Aug. 8, 1922.

2 SHEETSSHEET I.

w; 731 538558 lIVl/E/VTOR Rabi H: 0W6 F9,

A TTORIVEYS R. H. OWEN.

CYLINDER FOR THRASHING MACHINES.

APPLICATION FILED NOV- 2. 1921.

1 42%,933, Patented; Aug. 8, 1922.

2 SHEETS- SHEET 2.

[IV l/EN TOR ATTORNEYS rasrara ROBERT H, OWEN, OF BUTTE, MONTANA,ASSIGNOR 0F, ONEs'lH-IRD T0 EDWARD F. MAGINN AND'ONE-SIXTH TO M. H.GL-EASON, BOTH 0F BUTTE, MONTANA.

CYLINDER roa rHRAsHrive MACHINES.

Application liled November thrashing machines and more particularly to jthe cylinders thereof, my object'being the promotion of a cylinder of asimple eco-' nornical structure in which provision is made for the readyrenewal of brokenor otherwise unserviceable teeth and a further objectis to enable .the teeth to be replaced easily and "quickly withoutthe necessity of longcon plicated wrenches, as well as an arrangement inwhich the teeth will be rigidly held in their connected position againstshifting movement or displacement.

In the accompanying drawings which. illustrate my present invention andform a part of this specification,

Figure 1- is a top plan view of a cylinder for thrashing machinesconstructed in accordance with my invention,

Figure 2 is an end view thereof,

Figure 3 is a face view, looking from the inside, of one of the endplates,

Figure 4 is a top plan view thereof,

Figure 5 is a partial transverse section taken adjacent to the centralpartition or supporting plate,

Figure 6 is across section through one of the tooth bars adjacent to oneof the tooth seats thereof,

Figure 7 is a side view of the parts shown in Figure 6, j

Figure 8 is a detail perspective view of a portion of one of the endplates looking from the inside thereof,

Figure 9 is a detail section taken on line 9-9 of Figure 7, and

Figure 10 is a partial longitudinal section taken on line l.010 ofFigure 1.

Referring now to these figures and particularly to Figure 1 I have showna shaft at 10 on which the cylinder proposed by my invention is secured,the opposing end plates 11 of the cylinder having central hubs 12provided with key slots 1.3 adjacent to their shaft receiving bores forthe above purpose.

In addition to the two end plates 11 the cylinder includes a central orpartition plate 14 which, like the end plates 11, have periphSpecification of Letters Patent.-

2, 1921. Serial 1105512352.

ratemeaau a, 1922.

eral slots, the-side walls 15 of which slots are provided with'innerobliquely undercut sections 16 conformable to the shape of the toothbars 17 whose end portions extend into the peripheral slots or, groovesof the end: plates 11 and whosecentral portion extends through theconformably shaped peripheral slots or grooves of the partition'plate14.- It will be noted from Figures 2, 5, 6 and 7 that the tooth bars 17have the outer portionsof their side walls parallel and have their innerportions flared so that they thus slidably interfit the openingsperipherally of the end plates 11 and partition plate 14:, each of thebars 17 having secured to its inner face anchor plates 18, theconnection at which is effected by machine screws 19 threaded into" thebars and whose positioning inendwise abuttingrelation against the innersurfaces of the end plates 11 thus holds'the bars against lengthwisedisplacement under normal circumstances. Upon removal of one of theanchor plates the tooth bars may be shifted in the direction of theirlength out of the cylinder.

Each tooth bar 17 is also provided in its length with transverselydisposed and tapering recesses 20 into which, the inner reduced portions21 of the transversely tapering teeth 2-2 are adapted to interfit, eachtooth having a transverse opening adjacent to its inner end to alinewith an opening 28 transversely of the tooth bar in communication withits recess 20, for the reception of a connecting bolt 2 1. By reducingthe inner end of each tooth 22, the latter is left with an inwardlyfacing shoulder 25 as clearly shown in Figure .6 abutting the outer faceof the tooth bar which, in conjunction with. the taper of the tooth inboth lengthwise and transverse directions and similar tapers of thewalls of the tooth bar slots or recesses. obviously forms a strongsupporting connection for the tooth by virtue of which breakage is to agreat extent avoided.

Should a tooth break it is quite obvious that it is simply necessary toremove the In their arrangement around the cylinder itwillxbenoted'thatitheateeth 22 "are in staggered relation? as clearlyseenin Fig ure 1 and it is to be observed that upon certain of the bars1t'1s necessary tofiX'the-outeror end teeth in'the plane of the endplates 11. For

this purpose certain' of the peripheral slots- 15 have their sidewallscutfaway to form pockets 27 by means of'which the bolts and nutscan be 'reached and Withdrawn in the replacement of these particularteeth.

o it is quite obvious from. the foregoing thatthe means shovvn'and:described are Well adapted to the carrying out of the objects firstabovementioned and that the cylinder v as proposed 'byrny invention Willbestrong and durable, is capable of ready repair Without requiringparticular skill: for this purpose, and provides for easy interchange ofthe parts thereofi .lclaimz 1 1.- A thrashing cylinder having circularend plates and an intermediate circular supportor partition, saidpartition and' said end plates having longitudinally alinedperipheralgrooves provided Witlrunder out side Walls, tooth bars having flaringinner POT-j tions and slidable in the direction ofthei'r -lengths vintoand out of the said grooves,

means detachably associated with the tooth bars and engaging the end'plates"=to nor? 'mally.hold the tooth'wbarsxagainst sliding taperinglongitudinally and transversely to interfit the recesses and havingshouldered portions to seat against the outer faces ofthe bars.v I a 3.A tooth bar for thrashing cylinders having a series of recesses in 'itslength, each recess tapering vertically and transversely ofthe bar,lengthwise and transi'rersely'tapering teeth interfitting the saidrece'ss'e s at I one'end, and a connecti-ngbolt through-each tooth andthe adjacentportion 'of'thfe bar forsecuring the-teeth in place, thesaidre-f oess entering end or each tootl1 ;being ire,-

duced in one direction to form a shoulder-on the tooth abutting" theouter 'l'a'ceo fthe bar for the purpose described O ER J

